Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> 54e75eb0a71f2dbd2301c44f7b8fa9160a9cc0d80a1542503fca7b10f2f3c5f4:12:46
   |
12 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unexpectedly found nil while forcing an Optional value
  --> a355799993b95813.TMAUNFT:68:25
   |
68 |             let token <- self.ownedNFTs.remove(key: withdrawID)!
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^